fix(deps): update dependency eslint-config-next to v15

Author: renovate[bot]

packages/eslint-config-custom/package.json

@@ -8,7 +8,7 @@
         "@typescript-eslint/eslint-plugin": "latest",
         "@typescript-eslint/parser": "^6.7.2",
         "eslint": "^8.49.0",
-        "eslint-config-next": "13.5.3",
+        "eslint-config-next": "15.1.5",
         "eslint-config-prettier": "^8.10.0",
         "eslint-config-turbo": "latest",
         "eslint-plugin-react": "7.33.2"